Cool dogs, but he's absolutely right. I've been involved with dogs (not just owning a few) and have also known many who've owned the breed. Reproduction, breeding, and health problems are prevalent. Along with breathing issues, as well. (I hope insane snoring is not a problem for you.) They're very succeptible to heat stroke and sensitive to cold. As someone else said above, they have very 'active' digestive systems. They're also succeptible to skin infections and hip problems. Of course, it will vary from dog to dog, but you can almost guarantee at least a couple of these problems. Diet is important, especially during growth so as not to undernourish or overnourish (can cause growth and hip issues, etc.)
If you really want one, I suggest you do alot of research, not only on the breed, but on where you plan on purchasing one from. A reputable seller with an excellent, well-thought out breeding program and a good history, will go a long way towards a healthy English with less problems. I'd suggest even speaking to some of their (<--whoever you choose) customers and seeing how their Bulldogs have faired health wise and temperment.
It may seem like I'm talking you out of it, but I'm not. I'm all for someone purchasing a healthy, well bred example of a breed. With some, it just take more work. Good luck.